Coffee percolator and the like



Feb. 13, 1923.

G. USSORIO. COFFEE PERCOLATOR AND THE LIKE.

FILED AUG. 3. 1922.

INVENTOI? GF/V/Vfl/PO Uss omo wag/4;,

A TTOHNEYS Patented Feb. 13, 1923.

. near sac emnmao ussoaro, or new Yonmn. Y.

COFFEE PERCOLATOR AND THE LIKE.

Applicationfile d August 3, 1922. Serial No. 579,337.

To all whom it may concern Be it known that I, GENNARO USSORIO, a sub'ect of the King of Italy, and resident of liew York in the county of New York and- State of New York, have invented certain new and useful Improvement in Cofiee Percolators 1 and the like, of which the following is a specification.

It is well known that in of coffee either in a percolator' or in the ordinary coffee pot that the coffee mustonly be kept at the boiling point for alcomparatively short time, otherwise .it will become so strong as to be practically spoiled. Furthermore, the container may be seriously damaged if maintained for too long a period of time at a high degree of heat.

While attempts have been made to prqvide' devices of this. kind with a warning signal in the form of awhistle, such attempts have usually been unsuccessful because it has been the practice to rely merely upon the quantity of steam passing through the. whistle to sound it and the quantity ofsteam given ofl in devices of this kind, particularly at the beginning of the boiling action is insuificient' to produce a clearly audible signal.

The principal object of this invention therefore is to provide a new and improved structure of a Whistle adapted to be'attached to a coffee percolator or similar device which will give a clearly audible warning signal as soon as the contents are brought to the boiling point and which will continue to sound as long as the boiling continues.

A further object it to so construct the whistle as to produce a venturi effect in the steam column given off and by means of this effect draw in an auxiliary air supply to augment the steam and by the combined force of "both the steam and the air produce a sound of-suflicient volume and intensity as to be clearly and insistently audible.

For the accomplishment of these and such further objects as will hereinafter be apparent to those skilled in the art to which this' appertains, the invention consists in the construction, combination and arrangement of parts herein specifically described and illustrated in the accompanying draw-,

ings, wherein is shown a prefered embodiment of the invention, but it is to be understood that changes, variations and modifications may be resorted to which fall within the scope of the claims hereunto appended.

the preparation partly in section showing a whistleembodying my invention attached thereto. ig. 2 is a detail showing a central l0117i tudinal section through the whistle, and

Fig.- 3 is a horizontal section on the line 3-3 of Fig. 2. f

As shown in the drawings, the numeral .10 indicates the upper portion of a percolator provided with the usual stand pipe 11 having at its upper end the baille 12. The top of the peicolator is provided with an orifice 13 in which is secured as by means of the cooperating screw threads 14, the reduced nipple 15 of a whistle structure. The whistle .is preferably formed with a substantially semispherical lower portion 16 which is preferably provided with a knurled vor chased annular flange 17 Secured within or drilled at the base of the portion 16. and

which is preferably of the same dimensions as each of the apertures 18. The members 18 are joined together at their circumferential edges and are secured to the inner walls of the port-ion 16 dividing the interior of this part of the whistle from the" upper part of-the whistle structure. The upper part of the whistle comprises a hollow frusto-conical member 21, open at both ends, the base of which is secured to the lower portion 16, adj acent to the whistle members 18, and the upper end forms the discharge opening for the steam.

At a suitable point of the lowersemispherical member 16 below the whistle members 18, a suitable auxiliary air inlet orifice 22 is provided for a purpose which will hereinafter appear.

As. will be seen from Fig. 2 of the drawings, a pair of'chambers are provided, a lower one defined by the member 16, and an upper one defined by the frusto-conical member 20. These chambers are connected by a restricted passageway defined by the apertures 19. When the steam passes out through the aperture 20, it will pass uping permitted to expand within the chamber defined by" the frusto conical member 21; will produce a venturi efi'ect which will as well known, considerably increase its velocity, the velocity of the steam jet passing through the apertures 19 will cause an injector action which will draw in a considerable volumeof air through the auxiliary air inlet 22, thereby producing acombined jet of steam and air of sufficient volume to cause a sound of considerable intensity and volume to be produced by the whistle.

The shape of the member 21 not only serves to produce the venturi effect but also acts as a sounding box or pipe to augment the sound produced by the whistle member. Having thusdescribed my invention, what I claim as new and desire to secure by Letters Patent of the United States, is

1. A whistle comprising a base member provided with a chamber therein, said base member having a nipple adapted to be attached to a coffee percolator or similar device, an orifice in said base located centrally of said nippleand communicating with the interior of said percolator, a pair of whistle members provided with restrictedapertures in alignment with said orifice, a frust0-' 2. In a whistle adapted to be attached to I a coflee percolator to provide a passage for a discharge of a steam j'et from said percolator, means to produce a venturi effect on the steam jet passing through said whistle, said whistle provided with an auxiliary air inlet through which a column of air is drawn by the injector action of the Venturi effect produced upon said steam jet.

'Signed at New York, in the county of. New York and State of New York, this 29th day of May A. D. 1922.

GENNARO' 'USSORIO. 

